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UF V (E2+E2.1) 03/2013 page 27/112
2.6 Unit doors
2.6.1 Outer door
The outer gasket of the freezer outer door is heated. The door must be closed while the unit is operating
normally in order to ensure stable conditions in the inner chamber.
You can operate the automatic door mechanism (chap. 5.2) without using your hands:
•
Open: Firmly press the push-button “OPEN” e.g. with your elbow
•
Close: Firmly press on the door for at least 2 seconds e.g., with your shoulder, until the automatic door
lock is activated and closes the door tightly. The door then pulls tight automatically.
Following power connection / turning on the unit or closing the door, you can open the door
again only after approx. 30 seconds. This is to protect the electromechanical door mecha-
nism against damage.
Delay time for the temperature tolerance range alarm :
After closing the outer door, the tolerance range alarm is switched off for a programmable
delay time. This prevents alarms being constantly triggered during the unstable operating
phase after opening the outer door.
The outer door is available hinged left or right.
DANGER
Risk of locking in a person.
Danger of death.

Before closing doors, make sure that nobody is inside.

Pull the power plug before entering the interior (e.g. for cleaning purposes), thereto pull
the locking button on the plug (Figure 23).
2.6.2 Compartment doors
The freezer interior is divided into in 4 compartments, which are isolated against the surrounding with
doors. This permits bringing in or removing the samples of an individual compartment without remarkably
affect temperature in the other compartments.
The compartment doors remain closed by magnetism when opening the outer door without need for clos-
ing them mechanically.
Open the inner doors as shortly as possible to avoid a temperature rise inside the freezer. The maximum
angle of aperture is 90°.
2.6.3 Emergency release of the outer door
In case of power failure or a motor fault, you can open the unit door using the emergency release cover
(1). It is fixed with a cross tip screw.
Following an emergency release, the door can be closed again only by a service technician. Carry out the
emergency release only in emergency and make sure that unfreezing of the samples can be prevented.